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If you cut me wide open and you looked deep inside.

Would you find something deeper than this worrying mind?

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I have not used this much as of late.  I am now embarking on a tube amplifier repair project and want to document it.  The pic is the electronics from a Marshall JCM900 50W Hi Gain Master Volume MKII.  Currently, mechanical vibrations cause the amp to break up while playing (bad).  From some online research I have found that this either due to the breakdown of the electrolytic capacitors or a bad solder joint.  I think i’ve isolated the problem to a single board on the amp.  So now I need to get to that board, check it out and possibly replace some parts.

I have not used this much as of late.  I am now embarking on a tube amplifier repair project and want to document it.  The pic is the electronics from a Marshall JCM900 50W Hi Gain Master Volume MKII.  Currently, mechanical vibrations cause the amp to break up while playing (bad).  From some online research I have found that this either due to the breakdown of the electrolytic capacitors or a bad solder joint.  I think i’ve isolated the problem to a single board on the amp.  So now I need to get to that board, check it out and possibly replace some parts.